I'm trying to play an old video game console (the Nintendo 64) on my new Roku TV. While the RCA to HDMI converter I bought successfully connects the console to my television, none of the screen sizes that appear in the settings menu for the input simulate a 4:3 aspect ratio, which is necessary to prevent everything from being stretched strangely wide. Is there any way to connect the console to the TV in such a way that I can adjust the aspect ratio?